The Intersil X9317 is a digitally controlled potentiometer
(XDCP™). The device consists of a resistor array, wiper
switches, a control section, and nonvolatile memory. The wiper
position is controlled by a 3-wire interface.
The potentiometer is implemented by a resistor array
composed of 99 resistive elements and a wiper switching
network. Between each element and at either end are tap
points accessible to the wiper terminal. The position of the
wiper element is controlled by the CS, U/D, and INC inputs. The
position of the wiper can be stored in nonvolatile memory and
then be recalled upon a subsequent power-up operation.
The device can be used as a three-terminal potentiometer for
voltage control or as a two-terminal variable resistor for current
control in a wide variety of applications.

Features
• Solid-state potentiometer
• 3-wire serial up/down interface
• 100 wiper tap points
- Wiper position stored in nonvolatile memory and recalled
on power-up
• 99 resistive elements
- Temperature compensated
- End-to-end resistance range ±20%
• Low power CMOS
- VCC = 2.7V to 5.5V, and 5V ±10%
- Standby current <5µA
• High reliability
- Endurance, 100,000 data changes per bit
- Register data retention, 100 years
• RTOTAL values = 10kΩ, 50kΩ, 100kΩ
• Packages
- 8 Ld SOIC, TSSOP, and MSOP
• Pb-free (RoHS compliant)

Applications
• LCD bias control
• DC bias adjustment
• Gain and offset trim
• Laser diode bias control
• Voltage regulator output control